Build custom code-based evaluators in Amazon Bedrock AgentCore

📰 AWS Machine Learning

Learn to build custom code-based evaluators in Amazon Bedrock AgentCore for a financial market-intelligence agent

intermediate Published 18 May 2026

Action Steps

Build a Lambda function for a custom code evaluator
Register the evaluator with AgentCore
Run the evaluator in on-demand mode
Combine the custom evaluator with built-in evaluators
Call other AWS services for fact-checking and alerting

Who Needs to Know This

Machine learning engineers and developers can benefit from this tutorial to create custom evaluators for their agents, enhancing the capabilities of their ML models

Key Insight

💡 Custom code-based evaluators can be used to extend the capabilities of AgentCore and integrate with other AWS services